2 * Copyright (c) 2008 Vitor Sessak
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * memory buffer source filter
28 #include "libavutil/channel_layout.h"
29 #include "libavutil/common.h"
30 #include "libavutil/fifo.h"
31 #include "libavutil/frame.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/samplefmt.h"
37 #include "buffersrc.h"
46 AVRational time_base; ///< time_base to set in the output link
47 AVRational frame_rate; ///< frame_rate to set in the output link
48 unsigned nb_failed_requests;
49 unsigned warning_limit;
53 enum AVPixelFormat pix_fmt;
54 AVRational pixel_aspect;
59 enum AVSampleFormat sample_fmt;
62 uint64_t channel_layout;
63 char *channel_layout_str;
66 } BufferSourceContext;
68 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
69 if (c->w != width || c->h != height || c->pix_fmt != format) {\
70 av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
73 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format)\
74 if (c->sample_fmt != format || c->sample_rate != srate ||\
75 c->channel_layout != ch_layout || c->channels != ch_count) {\
76 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
77 return AVERROR(EINVAL);\
80 int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
82 return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
83 AV_BUFFERSRC_FLAG_KEEP_REF);
86 int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
88 return av_buffersrc_add_frame_flags(ctx, frame, 0);
91 static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
92 AVFrame *frame, int flags);
94 int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
99 if (frame && frame->channel_layout &&
100 av_get_channel_layout_nb_channels(frame->channel_layout) != av_frame_get_channels(frame)) {
101 av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
102 return AVERROR(EINVAL);
105 if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
106 return av_buffersrc_add_frame_internal(ctx, frame, flags);
108 if (!(copy = av_frame_alloc()))
109 return AVERROR(ENOMEM);
110 ret = av_frame_ref(copy, frame);
112 ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
114 av_frame_free(©);
118 static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
119 AVFrame *frame, int flags)
121 BufferSourceContext *s = ctx->priv;
125 s->nb_failed_requests = 0;
131 return AVERROR(EINVAL);
133 if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
135 switch (ctx->outputs[0]->type) {
136 case AVMEDIA_TYPE_VIDEO:
137 CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
140 case AVMEDIA_TYPE_AUDIO:
141 /* For layouts unknown on input but known on link after negotiation. */
142 if (!frame->channel_layout)
143 frame->channel_layout = s->channel_layout;
144 CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
145 av_frame_get_channels(frame), frame->format);
148 return AVERROR(EINVAL);
153 if (!av_fifo_space(s->fifo) &&
154 (ret = av_fifo_realloc2(s->fifo, av_fifo_size(s->fifo) +
158 if (!(copy = av_frame_alloc()))
159 return AVERROR(ENOMEM);
160 av_frame_move_ref(copy, frame);
162 if ((ret = av_fifo_generic_write(s->fifo, ©, sizeof(copy), NULL)) < 0) {
163 av_frame_move_ref(frame, copy);
164 av_frame_free(©);
168 if ((flags & AV_BUFFERSRC_FLAG_PUSH))
169 if ((ret = ctx->output_pads[0].request_frame(ctx->outputs[0])) < 0)
175 #if FF_API_AVFILTERBUFFER
176 static void compat_free_buffer(void *opaque, uint8_t *data)
178 AVFilterBufferRef *buf = opaque;
179 AV_NOWARN_DEPRECATED(
180 avfilter_unref_buffer(buf);
184 static void compat_unref_buffer(void *opaque, uint8_t *data)
186 AVBufferRef *buf = opaque;
187 AV_NOWARN_DEPRECATED(
188 av_buffer_unref(&buf);
192 int av_buffersrc_add_ref(AVFilterContext *ctx, AVFilterBufferRef *buf,
195 BufferSourceContext *s = ctx->priv;
196 AVFrame *frame = NULL;
197 AVBufferRef *dummy_buf = NULL;
198 int ret = 0, planes, i;
204 return AVERROR(EINVAL);
206 frame = av_frame_alloc();
208 return AVERROR(ENOMEM);
210 dummy_buf = av_buffer_create(NULL, 0, compat_free_buffer, buf,
211 (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY);
213 ret = AVERROR(ENOMEM);
217 AV_NOWARN_DEPRECATED(
218 if ((ret = avfilter_copy_buf_props(frame, buf)) < 0)
222 #define WRAP_PLANE(ref_out, data, data_size) \
224 AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf); \
226 ret = AVERROR(ENOMEM); \
229 ref_out = av_buffer_create(data, data_size, compat_unref_buffer, \
230 dummy_ref, (buf->perms & AV_PERM_WRITE) ? 0 : AV_BUFFER_FLAG_READONLY); \
232 av_frame_unref(frame); \
233 ret = AVERROR(ENOMEM); \
238 if (ctx->outputs[0]->type == AVMEDIA_TYPE_VIDEO) {
239 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
241 planes = av_pix_fmt_count_planes(frame->format);
242 if (!desc || planes <= 0) {
243 ret = AVERROR(EINVAL);
247 for (i = 0; i < planes; i++) {
248 int v_shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
249 int plane_size = (frame->height >> v_shift) * frame->linesize[i];
251 WRAP_PLANE(frame->buf[i], frame->data[i], plane_size);
254 int planar = av_sample_fmt_is_planar(frame->format);
255 int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
257 planes = planar ? channels : 1;
259 if (planes > FF_ARRAY_ELEMS(frame->buf)) {
260 frame->nb_extended_buf = planes - FF_ARRAY_ELEMS(frame->buf);
261 frame->extended_buf = av_mallocz(sizeof(*frame->extended_buf) *
262 frame->nb_extended_buf);
263 if (!frame->extended_buf) {
264 ret = AVERROR(ENOMEM);
269 for (i = 0; i < FFMIN(planes, FF_ARRAY_ELEMS(frame->buf)); i++)
270 WRAP_PLANE(frame->buf[i], frame->extended_data[i], frame->linesize[0]);
272 for (i = 0; i < planes - FF_ARRAY_ELEMS(frame->buf); i++)
273 WRAP_PLANE(frame->extended_buf[i],
274 frame->extended_data[i + FF_ARRAY_ELEMS(frame->buf)],
278 ret = av_buffersrc_add_frame_flags(ctx, frame, flags);
281 av_buffer_unref(&dummy_buf);
282 av_frame_free(&frame);
287 int av_buffersrc_buffer(AVFilterContext *ctx, AVFilterBufferRef *buf)
289 return av_buffersrc_add_ref(ctx, buf, 0);
293 static av_cold int init_video(AVFilterContext *ctx)
295 BufferSourceContext *c = ctx->priv;
297 if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h || av_q2d(c->time_base) <= 0) {
298 av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
299 return AVERROR(EINVAL);
302 if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*))))
303 return AVERROR(ENOMEM);
305 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n",
306 c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
307 c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
308 c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
309 c->warning_limit = 100;
313 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
315 return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
318 #define OFFSET(x) offsetof(BufferSourceContext, x)
319 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
320 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
322 static const AVOption buffer_options[] = {
323 { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
324 { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
325 { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
326 { "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = V },
327 #if FF_API_OLD_FILTER_OPTS
328 /* those 4 are for compatibility with the old option passing system where each filter
329 * did its own parsing */
330 { "time_base_num", "deprecated, do not use", OFFSET(time_base.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
331 { "time_base_den", "deprecated, do not use", OFFSET(time_base.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
332 { "sar_num", "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
333 { "sar_den", "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
335 { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
336 { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, DBL_MAX, V },
337 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
338 { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
339 { "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V },
343 AVFILTER_DEFINE_CLASS(buffer);
345 static const AVOption abuffer_options[] = {
346 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
347 { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
348 { "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = A },
349 { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
350 { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
354 AVFILTER_DEFINE_CLASS(abuffer);
356 static av_cold int init_audio(AVFilterContext *ctx)
358 BufferSourceContext *s = ctx->priv;
361 s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
362 if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
363 av_log(ctx, AV_LOG_ERROR, "Invalid sample format %s\n",
365 return AVERROR(EINVAL);
368 if (s->channel_layout_str) {
371 s->channel_layout = av_get_channel_layout(s->channel_layout_str);
372 if (!s->channel_layout) {
373 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
374 s->channel_layout_str);
375 return AVERROR(EINVAL);
377 n = av_get_channel_layout_nb_channels(s->channel_layout);
379 if (n != s->channels) {
380 av_log(ctx, AV_LOG_ERROR,
381 "Mismatching channel count %d and layout '%s' "
383 s->channels, s->channel_layout_str, n);
384 return AVERROR(EINVAL);
388 } else if (!s->channels) {
389 av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
390 "channel layout specified\n");
391 return AVERROR(EINVAL);
394 if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*))))
395 return AVERROR(ENOMEM);
397 if (!s->time_base.num)
398 s->time_base = (AVRational){1, s->sample_rate};
400 av_log(ctx, AV_LOG_VERBOSE,
401 "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
402 s->time_base.num, s->time_base.den, s->sample_fmt_str,
403 s->sample_rate, s->channel_layout_str);
404 s->warning_limit = 100;
409 static av_cold void uninit(AVFilterContext *ctx)
411 BufferSourceContext *s = ctx->priv;
412 while (s->fifo && av_fifo_size(s->fifo)) {
414 av_fifo_generic_read(s->fifo, &frame, sizeof(frame), NULL);
415 av_frame_free(&frame);
417 av_fifo_free(s->fifo);
421 static int query_formats(AVFilterContext *ctx)
423 BufferSourceContext *c = ctx->priv;
424 AVFilterChannelLayouts *channel_layouts = NULL;
425 AVFilterFormats *formats = NULL;
426 AVFilterFormats *samplerates = NULL;
428 switch (ctx->outputs[0]->type) {
429 case AVMEDIA_TYPE_VIDEO:
430 ff_add_format(&formats, c->pix_fmt);
431 ff_set_common_formats(ctx, formats);
433 case AVMEDIA_TYPE_AUDIO:
434 ff_add_format(&formats, c->sample_fmt);
435 ff_set_common_formats(ctx, formats);
437 ff_add_format(&samplerates, c->sample_rate);
438 ff_set_common_samplerates(ctx, samplerates);
440 ff_add_channel_layout(&channel_layouts,
441 c->channel_layout ? c->channel_layout :
442 FF_COUNT2LAYOUT(c->channels));
443 ff_set_common_channel_layouts(ctx, channel_layouts);
446 return AVERROR(EINVAL);
452 static int config_props(AVFilterLink *link)
454 BufferSourceContext *c = link->src->priv;
456 switch (link->type) {
457 case AVMEDIA_TYPE_VIDEO:
460 link->sample_aspect_ratio = c->pixel_aspect;
462 case AVMEDIA_TYPE_AUDIO:
463 if (!c->channel_layout)
464 c->channel_layout = link->channel_layout;
467 return AVERROR(EINVAL);
470 link->time_base = c->time_base;
471 link->frame_rate = c->frame_rate;
475 static int request_frame(AVFilterLink *link)
477 BufferSourceContext *c = link->src->priv;
480 if (!av_fifo_size(c->fifo)) {
483 c->nb_failed_requests++;
484 return AVERROR(EAGAIN);
486 av_fifo_generic_read(c->fifo, &frame, sizeof(frame), NULL);
488 return ff_filter_frame(link, frame);
491 static int poll_frame(AVFilterLink *link)
493 BufferSourceContext *c = link->src->priv;
494 int size = av_fifo_size(c->fifo);
497 return size/sizeof(AVFrame*);
500 static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
503 .type = AVMEDIA_TYPE_VIDEO,
504 .request_frame = request_frame,
505 .poll_frame = poll_frame,
506 .config_props = config_props,
511 AVFilter avfilter_vsrc_buffer = {
513 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
514 .priv_size = sizeof(BufferSourceContext),
515 .query_formats = query_formats,
521 .outputs = avfilter_vsrc_buffer_outputs,
522 .priv_class = &buffer_class,
525 static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
528 .type = AVMEDIA_TYPE_AUDIO,
529 .request_frame = request_frame,
530 .poll_frame = poll_frame,
531 .config_props = config_props,
536 AVFilter avfilter_asrc_abuffer = {
538 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
539 .priv_size = sizeof(BufferSourceContext),
540 .query_formats = query_formats,
546 .outputs = avfilter_asrc_abuffer_outputs,
547 .priv_class = &abuffer_class,